Packing for pressure-pistons.



No. 700,334.- Patented May 27, 1902;

A. SCHOLL.

PACKING FOR PRESSURE PISTONS.

(Application filed sgpt. 1a, 1901.

MM P

(No Model.)

UNITED STATES PATENT Gretna.

ALBERT SCHOLL, OF MANNHEIM, GERMANY.

I PACKING FOR PRESSURE-PISTONS.

SPECIFICATION forming part of Letters Patent No. 700,834, dated May 27,

pplication filed September 16,1901. SerialNo. 75,583. (No model.)

To all whom, it may concern:

Be it known that I, ALBERT SCHOLL, a subject of the King of Prussia, Emperor of Germany, residing at Tullastrasse l1, Mannheim, Germany, have invented certain new and useful Improvements in Packing for Pressure-Pistons, of which the following is a specification.

This invention relates to improvements in packing for pressure-pistons; and the object is to employ a liquid packing in such a way that it may operate with higher pressures than in constructions employing liquid packing hitherto employed. The construction by which this is obtained is represented in the annexed drawings.

Figure 1 is a section of the pressure-piston and adjacent parts in its lowest position; Fig.

2, a section of the piston in its highest position, and Fig. 3 is a cross-section of Fig. 1 on the line A B. V

The conduit 1), connected with the suction- I valve container 0, is provided at that part which receives the pressure-piston Ct with a plurality of concentric cylinders 0 19-forinstance, with two, as shown in Fig.1the number of the said cylinders depending on the pressure to be obtained and the specific gravity of the packing liquid. An equal number of concentric cylinders m n are arranged on the piston ain the present case, therefore, two. The latter dip into the spaces formed by the cylinders 0 p and the packing or sealin gliquid contained inthe said spaces, so that annular spaces 1 2 3 4 5 are formed, as shown in Figs. 1 and 2.

In the lowest position of the piston at the end of the period of compression, as shown in Fig. 1, when the suction-valve container 0, conduit 1), and suction-conduit d are filled with packing liquid and the compressed gas is forced through the connecting-conduit g almost the whole of the packing liquid-that is to say, all except that required for packing-is forced by the overpressure in container c and conduit 7) and also in spaces 2 and 4 into spaces 3 and 5, so that not only one space, but also the two last-named spaces, are filled with packing liquid. When the piston has reached its highest position at the end of the period of suction, the pressure in conduit 1) and in spaces 2 and 4: falls to such an extent that the packing liquid falls both in the conduit b and, in the spaces 3 and 5, but rises in spaces 2 and 4, as shown in Fig. 2, still, however, forming the required seal between the spaces 2 3 and 4 5. 7

It may be stated that the gas or air filled spaces 2 and 4: in the position of the piston shown in Fig. 1 and spaces 1 2 3 4 5 in the position of the piston shown in Fig. 2 may also be filled with a liquid specifically lighter than the packing liquid at the bottom of the said .spaces.

7 The number of cylinders connected with the pipe I) and the piston a, respectively, may of course, vary, from two upward and depends upon the pressure which is to be obtained in the pump-cylinder and on the specific gravity of the packing liquid contained inthe pumpcylinder 1) and the chamber 1, 3, and'5, Fig. 1. i

In this invention the pressure in the pumpcylinder 1) and the gas-conduit g does not depend only upon the height-of the columns of liquid 3 and 5, Fig. 1, but also upon the number of these columns. If, for instance, the height of the columns of liquid, Fig. 1, is five meters, the pressure of the air in the annular space 4 is equal to one and a halt atmospheres, since the said air is under the pressure of the five-meters column of liquid 5, Fig. 1. The column of liquid in the annular space 3, between the cylinders 0 and m,is also equal to the additional pressure of one-half an atmosphere. The air in the annular space 2, between the cylinders m and b, and consequently the gas to be compressed in the pipe g, are therefore under pressure of one-half plus one and one-half equal two atmospheres, or twice the ordinary atmospheric pressure. If instead of two cylinders 0 and p and two cylinders m and a four of each set'of cylinders are provided and the height of the cylinders is 5 meters, a gas-pressure of 3 atmospheres can be obtained. Similarly the addition of each further two pairs of cylinders is equivalent to an additional atmosphere.

I am aware that pistons have been packed by one annular packing; but I consider my invention to lie in the employment of a plurality of such annular liquid packings each acting to reinforce the preceding one.

By means of the plurality of liquid pack ings acting as described,which allows of prossure equivalent to an indefinite height in the compression chamber irrespective of the length of the piston it is rendered possible to liqnify chlorin and other gas without employ ing other than liquid packing in the gas-densifier.

I declare that what I claim is-- 1. The combination with a pressure-cylinder and a plurality of cylinders 0 connected concentrically to said pressure-cylind er, of a piston adapted to be reciprocated in said pressure-cylinder, a plurality of other cylinders m it connected concentrically to said piston and adapted to be reciprocated therewith in the annular spaces respectively formed by the aforesaid cylinders 0 p and sealing liquid so disposed in said annular spaces as to severally seal each from the next and to provide a combined columnar pressure exceeding that equivalent to the length of the stroke of the piston.

2. The combination with a pressure-cylinder and a plurality of cylinders o 19 connected concentrically to said pressure-cylinder, a piston adapted to be reciprocated in said pressure-cylinder, a plurality of other cylinders m n connected concentrically to said pisstroke of the piston.

In witness whereof I have signed this specification in the presence of two witnesses.

ALBERT SOHOLL. Witnesses:

JACOB ADRIAN, H. W. HARRIS. 

